Educational appliance.



Patented Aug. 16, 1910.

Tus Narmrs PETER: ce., wAsHmcm/v, 1:!A c.

"UNITED sTATEs PATENT onnicn.

JOHN Gr. WARFIELD, OF LOS ANGELES, CALIFORNIA, ASSIGNOR OE ONE-FOURTH4'130 C. It. HARRIS, OE LOS ANGELES, CALIFORNIA.

EDUCATIONAL APPLIANCE.

967,591, Specification of Letters Patent. Patented Aug- 16s 1910,Application led July 14, 1909. Serial No. 507,589.

To all whom 'it may concern: to the cylindrical body 7 in any approvedBe it known that I, J oHN Gr. WARFIELD, manner, but I have shown themheld by the a citizen of the United States, residing at buttons 9. Thebuttons can either be re- Los Angeles, in the county of Los Angelesmoved from the cylinder for connecting the 5 and State of California,have invented cersheets thereto, or the sheets can be slipped 55 tainnew and useful Improvements in Eduover the buttons by providing thesheets with cational Appliances, of which the following slits oropenings 11. is a specification. The cylinder or member 7 is rotatedupon My invention relates to an improvement in the base A, bringing thedesired column of i0 educational appliances, the object being to figuresinto view through the slot 1 of the 60 provide means whereby a cylinderhaving upright B. The slide 3 can be moved to columns of figures thereoncan be rotated, any position for varying the length of the whereby thecolumns of figures will be pre column, and exposing any desired number vsented to view, through an opening in an of figures, for instance fouror live figures upright to permit of the columns of gures can beexposed, at a time, for the purpose 65 being added. of adding, or agreater or less number can A further object is to provide means beexposed by shifting the slide. A device whereby a long or short columnof figures of this character is intended to be used more may be exposedat the will of the operator. particularly in schools for the purpose ofThe invention consists in certain other teaching addition, and byproviding columns 70 novel features of construction and co1nbnaoffigures differently arranged upon the tions of parts which will behereinafter desheet, the pupil will thereby become fascribed and pointedout in the claim. miliar with the different numerals, and the In theaccompanying drawings :-Figure 1 result of these different numerals whenis a perspective view, Fig. 2 is a vertical secadded together. As thesheets 10 are capa- 75 tional view, Fig. 3 is a cross section, and bleof being removed, new sheets can be sup- Fig. 4 is a detail sectionalview, showing the plied and applied to the cylinder. manner of applyingor connecting the sheets It is evident that more or less slight on thecylindrical body. changes might be resorted to in the form A, representsthe base, andB is an upright and arrangement of the several parts desoconnected thereto, which is provided with a scribed without departingfrom the spirit vertical slot 1. Flanges or guides 2, 2, are and scopeof my invention, and hence I do connected to the inner side of theupright not wish to be limited to the exact construc- B, and a slide 3passing through the top of tion herein set forth, but

the upright is received between the anges Having fully described myinvention, 85 and upright, the flanges forming guides for what I claimas new and desire to secure the slide in its movement. A concave openbyLetters Patent, is z ing 4: is formed in the base A, in which is `Aneducational device comprising a base,

received a convex bearing 5 on the bottom 6, an upright connectedthereto having a vertiof the cylindrical body-or member 7. The cal slotformed therein, a member having 90 bottom 6 is preferably made of wood,and columns of characters thereon rotatably the cylindrical body 7 ofheavy card-board. mounted on the base, and a slide on the Hoops 8 arereceived within the cylindrical upright for varying the amount ofexposure body 7 at certain intervals for forming of the column ofcharacters through the slot.

proper support for the body. Buttons or In testimony whereofI affix mysignature, 95

knobs 9 are formed along the upper and in the presence of two witnesses.

lower edges of the cylindrical body 7 where- JOHN Gr. WARFIELD. by thecylinder can be rotated upon the base Witnesses: A. Removable sheets ofcardboard l0 hav- W. M. I-IoLBnoox,

ing columns of figures thereon are connected y J. G. I'IrLMEn.

